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Updated: Sep 12, 2025

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东部马类脑炎病毒E2葡萄糖蛋白协调甲酸和蛋白质受体依赖感染的三个带正电荷的结合点
Maria D H Alcorn1,2, Chengqun Sun2, Theron C Gilliland2
1Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA.
Nature communications
|August 5, 2025
概括
东部马脑炎病毒 (EEEV) 在其E2糖蛋白上使用多个位点来结合硫酸 (HS) 和蛋白质受体. 这些相互作用对于病毒感染性,疾病和蚊子传播至关重要.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 东部马脑炎病毒 (EEEV) 感染是一个严重的公共卫生问题.
- 电子电子电子汽车利用硫酸肝素 (HS) 和特定的蛋白质受体进入细胞和致病.
- 之前的研究已经在参与HS结合的E2糖蛋白上发现了三个带正电荷的氨基酸集群.
研究的目的:
- 研究每一个HS相互作用位点在EEEV E2糖蛋白上的个别贡献.
- 确定这些部位在HS和蛋白质受体依赖病毒感染中的作用.
- 在动物模型中评估这些相互作用对EEEV复制和疾病的影响.
主要方法:
- 针对EEEV E2糖蛋白的位点定向突变,以改变HS结合集群.
- 在体外感染测定使用表达HS和特定蛋白质受体 (VLDLR,ApoER2,LDLR) 的细胞.
- 在体内研究涉及小鼠的鼻腔内接种,以评估病毒复制和神经病变发生.
主要成果:
- 每个已识别的HS相互作用部位都会导致EEEV与HS和蛋白质受体结合.
- 改变这些HS结合部位显著影响小鼠的EEEV感染和疾病表型.
- 修改这些部位也可以消除蚊子中的EEEV传染性.
结论:
- EEEV在其E2糖蛋白上具有多个功能HS结合点.
- 这些HS结合部位在功能上与调解蛋白质受体相互作用的部位重叠.
- 这两种HS和蛋白质受体相互作用对于EEEV组织感染性,病变发生和传播都至关重要.
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